• The actual flow rate is constant for the outlet pressure range of 35.30 psig to as low as a complete vacuum. The flow rate can be obtained from the charts on pages 16-18; e.g. for an orifice of .010" diameter and with 80 psig inlet pressure, the choked flow rate is 8.4 scfh (page 16). This flow rate will be constant for all outlet pressure conditions between 35.30 psig and full vacuum. 0 1 .5...

Overload pressure sensor can be used to measure and control the pressure of the high pressure compressed air and gas. In this paper, under the premise of ensuring the sensor full-scale range of linear response, through the appropriate contact of the flexible diaphragm and the substrate to effectively improve the sensor overload. Overload pressure sensor has a housing, metal pressure port as wel...

In the United States a large percentage of raw poultry meat is marinated prior to cooking. Many products are marinated by vacuum tumbling meat with a mixture of water, salt, and phosphates to increase cook yield and perceived tenderness. This study was designed to determine the effect of 3 pressure treatments (ambient, vacuum, or positive) and phosphate on yield, tenderness, and color on broile...

This paper reports two multitransducer vacuumsealed capacitive barometric pressure sensors, one using singlelead and the other using multiple-leads to transfer the electrical signal out of the vacuum-sealed reference cavity. The first device operates with a resolution of 37 mtorr over a pressure range from 600 to 800 torr. The sensitivity is 27 fF/torr (3000 ppm/torr). The TCO at 750 torr is 39...

The casimir pressure on a non ideal conducting slab is calculated. Using a simple model for the conductivity according to which the slab is perfectly conducting at frequencies below plasma frequency ωp and perfectly transparent above such frequency, it is found that the vacuum pressure on each surface of the slab is h̄ω p 24πc which is finite without removal of any divergence.

Are there sound waves in the vacuum? The question might seem silly, but here’s my point: (i) the Higgs vacuum of the Standard Model, with its nonzero background field 〈Φ〉 6 = 0, is not ‘empty,’ but rather is a kind of medium. (ii) For very basic reasons, one expects any medium to propagate pressure waves for sufficiently long wavelengths. At length scales much, much longer than the mean free pa...

Brookhaven is undertaking the design, construction and commissioning of the accumulator ring and the beam transport lines for the 1-GeV Spallation Neutron Source. The operating pressure of the accumulator ring vacuum system will be 10 Torr and is needed to minimize the beam-residual gas ionization. The vacuum requirement, the layout of the ring vacuum system, and the design of the vacuum chambe...

Cold atoms play a very important role in metrology. The ultra-high or extreme-high vacuum pressure can be accurately measured by investigating the collision of cold and residual environment. We report metrometer using 7Li as sensor magneto-optical trap magnetic trap. accuracy, uncertainty, feasibility measurements such two different traps are studied compared range from 10−5 to 10−8 Pa. It is f...

This paper describes a new method of sensor failure detection, isolation, and accommodation using a neural network approach. In a propulsion system such as the Space Shuttle Main Engine, the dynamics are usually very complicated and sometimes not well known. However, the number of variables measured is usually much higher than the order of the system. This built-in redundancy of the sensors can...